Our attitude towards risk shapes nearly every aspect of our behavior. It affects our willingness to take drugs of abuse, to make efficient financial investments, and to select amongst healthcare options. We know that these attitudes change over the lifespan and that these changes make us vulnerable in different ways as we age. Adolescents engage in risky behaviors that hugely increase their mortality rates. Elders typically show the opposite profile, avoiding risky behaviors to a fault. But what is it about our behavior that changes as we age? What specific behavioral propensities and neurobiological features of aging can account for the changing attitudes we take towards risks? In this application we propose to combine economic, psychological and neurobiological approaches to the study of risky behavior in an effort to paint a portrait of risk attitudes across the lifespan at the behavioral and neural levels. Behavioral economic analyses suggests that risk-taking behavior results from the three largely independent attitudes towards risks: (1) Technical risk-aversion, which reflects a trade- off between the probability of gains or losses and the magnitude of those gains and losses, (2) Ambiguity aversion, which reflects the subject's sensitivity to uncertainty, and (3) Loss aversion, which reflects a subject's differential sensitivity to losses and gains. We hypothesize that the reduction in risk-taking behavior across the lifespan that is widely observed is primarily due to an increase in ambiguity aversion, rather than to an increase in risk or loss attitudes. Further, we hypothesize that, if anything, humans should become less technically risk averse and loss averse as they age. At the neural level, we also know that there are clear structural patterns in brain development that may well underlie these behavioral changes observed across the lifespan. Of particular interest to our hypothesis is the observation that frontal regions mature late, actually thinning during development and actually continue to thin throughout the lifespan. Activational patterns fronto-cortical decision areas also change throughout the lifespan. These data suggest that both morphologic and functional properties of the frontal cortex may contribute to these changes in risk-related behavior over the lifespan, a hypothesis we propose to test with a mixture of behavioral and functional imaging techniques.

Public Health Relevance

Our attitude towards risk shapes nearly every aspect of our behavior, including our willingness to take drugs of abuse, to make efficient financial investments, and to select amongst healthcare options. We know that these attitudes change over the lifespan and that these changes make us vulnerable in different ways as we age. We propose an analysis of the precise behavioral and neural basis of risk attitudes across the lifespan in an effort to better understand the neural basis of behaviors such as drug abuse, adolescent risk-taking, and healthcare decision-making.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
1R01AG033406-01A2
Application #
7889277
Study Section
Special Emphasis Panel (ZRG1-IFCN-L (02))
Program Officer
Nielsen, Lisbeth
Project Start
2010-05-15
Project End
2015-04-30
Budget Start
2010-05-15
Budget End
2011-04-30
Support Year
1
Fiscal Year
2010
Total Cost
$343,379
Indirect Cost
Name
Yale University
Department
Veterinary Sciences
Type
Schools of Medicine
DUNS #
043207562
City
New Haven
State
CT
Country
United States
Zip Code
06520
Pushkarskaya, Helen; Tolin, David; Ruderman, Lital et al. (2017) Value-based decision making under uncertainty in hoarding and obsessive- compulsive disorders. Psychiatry Res 258:305-315
Grubb, Michael A; Tymula, Agnieszka; Gilaie-Dotan, Sharon et al. (2016) Neuroanatomy accounts for age-related changes in risk preferences. Nat Commun 7:13822
Khaw, Mel W; Grab, Denise A; Livermore, Michael A et al. (2015) The Measurement of Subjective Value and Its Relation to Contingent Valuation and Environmental Public Goods. PLoS One 10:e0132842
Pushkarskaya, Helen; Tolin, David; Ruderman, Lital et al. (2015) Decision-making under uncertainty in obsessive-compulsive disorder. J Psychiatr Res 69:166-73
Pushkarskaya, Helen; Smithson, Michael; Joseph, Jane E et al. (2015) Neural Correlates of Decision-Making Under Ambiguity and Conflict. Front Behav Neurosci 9:325
Manson, Kirk F; Levy, Ifat (2015) ""Selling"" value: the influence of language on willingness-to-accept. PLoS One 10:e0120292
Kable, Joseph W; Levy, Ifat (2015) Neural markers of individual differences in decision-making. Curr Opin Behav Sci 5:100-107
Gilaie-Dotan, Sharon; Tymula, Agnieszka; Cooper, Nicole et al. (2014) Neuroanatomy predicts individual risk attitudes. J Neurosci 34:12394-401
Tymula, Agnieszka; Rosenberg Belmaker, Lior A; Ruderman, Lital et al. (2013) Like cognitive function, decision making across the life span shows profound age-related changes. Proc Natl Acad Sci U S A 110:17143-8
Levy, Ifat; Rosenberg Belmaker, Lior; Manson, Kirk et al. (2012) Measuring the subjective value of risky and ambiguous options using experimental economics and functional MRI methods. J Vis Exp :e3724

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